/* BEGIN_HEADER */
#include "mbedtls/rsa.h"
#include "mbedtls/md.h"

#include "mbedtls/legacy_or_psa.h"
/* END_HEADER */

/* BEGIN_DEPENDENCIES
 * depends_on:MBEDTLS_PKCS1_V15:MBEDTLS_RSA_C
 * END_DEPENDENCIES
 */

/* BEGIN_CASE */
void pkcs1_rsaes_v15_encrypt(int mod, char *input_N,
                             char *input_E, int hash,
                             data_t *message_str, data_t *rnd_buf,
                             data_t *result_str, int result)
{
    unsigned char output[128];
    mbedtls_rsa_context ctx;
    mbedtls_test_rnd_buf_info info;
    mbedtls_mpi N, E;

    info.fallback_f_rng = mbedtls_test_rnd_std_rand;
    info.fallback_p_rng = NULL;
    info.buf = rnd_buf->x;
    info.length = rnd_buf->len;

    mbedtls_mpi_init(&N); mbedtls_mpi_init(&E);
    mbedtls_rsa_init(&ctx);

    TEST_EQUAL(mbedtls_rsa_get_padding_mode(&ctx), MBEDTLS_RSA_PKCS_V15);
    TEST_EQUAL(mbedtls_rsa_get_md_alg(&ctx), MBEDTLS_MD_NONE);

    TEST_ASSERT(mbedtls_rsa_set_padding(&ctx,
                                        MBEDTLS_RSA_PKCS_V15, hash) == 0);
    memset(output, 0x00, sizeof(output));

    TEST_EQUAL(mbedtls_rsa_get_padding_mode(&ctx), MBEDTLS_RSA_PKCS_V15);
    TEST_EQUAL(mbedtls_rsa_get_md_alg(&ctx), hash);

    TEST_ASSERT(mbedtls_test_read_mpi(&N, input_N) == 0);
    TEST_ASSERT(mbedtls_test_read_mpi(&E, input_E) == 0);
    TEST_ASSERT(mbedtls_rsa_import(&ctx, &N, NULL, NULL, NULL, &E) == 0);
    TEST_ASSERT(mbedtls_rsa_get_len(&ctx) == (size_t) ((mod + 7) / 8));
    TEST_ASSERT(mbedtls_rsa_check_pubkey(&ctx) == 0);

    if (message_str->len == 0) {
        message_str->x = NULL;
    }
    TEST_ASSERT(mbedtls_rsa_pkcs1_encrypt(&ctx,
                                          &mbedtls_test_rnd_buffer_rand,
                                          &info, message_str->len,
                                          message_str->x,
                                          output) == result);

    if (result == 0) {
        TEST_ASSERT(mbedtls_test_hexcmp(output, result_str->x,
                                        ctx.len, result_str->len) == 0);
    }

exit:
    mbedtls_mpi_free(&N); mbedtls_mpi_free(&E);
    mbedtls_rsa_free(&ctx);
}
/* END_CASE */

/* BEGIN_CASE */
void pkcs1_rsaes_v15_decrypt(int mod, char *input_P, char *input_Q,
                             char *input_N, char *input_E, int hash,
                             data_t *result_str, char *seed,
                             data_t *message_str, int result)
{
    unsigned char output[128];
    mbedtls_rsa_context ctx;
    size_t output_len;
    mbedtls_test_rnd_pseudo_info rnd_info;
    mbedtls_mpi N, P, Q, E;
    ((void) seed);

    mbedtls_mpi_init(&N); mbedtls_mpi_init(&P);
    mbedtls_mpi_init(&Q); mbedtls_mpi_init(&E);
    mbedtls_rsa_init(&ctx);
    TEST_ASSERT(mbedtls_rsa_set_padding(&ctx,
                                        MBEDTLS_RSA_PKCS_V15, hash) == 0);

    TEST_EQUAL(mbedtls_rsa_get_padding_mode(&ctx), MBEDTLS_RSA_PKCS_V15);
    TEST_EQUAL(mbedtls_rsa_get_md_alg(&ctx), hash);

    memset(output, 0x00, sizeof(output));
    memset(&rnd_info, 0, sizeof(mbedtls_test_rnd_pseudo_info));

    TEST_ASSERT(mbedtls_test_read_mpi(&P, input_P) == 0);
    TEST_ASSERT(mbedtls_test_read_mpi(&Q, input_Q) == 0);
    TEST_ASSERT(mbedtls_test_read_mpi(&N, input_N) == 0);
    TEST_ASSERT(mbedtls_test_read_mpi(&E, input_E) == 0);

    TEST_ASSERT(mbedtls_rsa_import(&ctx, &N, &P, &Q, NULL, &E) == 0);
    TEST_ASSERT(mbedtls_rsa_get_len(&ctx) == (size_t) ((mod + 7) / 8));
    TEST_ASSERT(mbedtls_rsa_complete(&ctx) == 0);
    TEST_ASSERT(mbedtls_rsa_check_privkey(&ctx) == 0);

    if (result_str->len == 0) {
        TEST_ASSERT(mbedtls_rsa_pkcs1_decrypt(&ctx,
                                              &mbedtls_test_rnd_pseudo_rand,
                                              &rnd_info,
                                              &output_len, message_str->x,
                                              NULL, 0) == result);
    } else {
        TEST_ASSERT(mbedtls_rsa_pkcs1_decrypt(&ctx,
                                              &mbedtls_test_rnd_pseudo_rand,
                                              &rnd_info,
                                              &output_len, message_str->x,
                                              output, 1000) == result);
        if (result == 0) {
            TEST_ASSERT(mbedtls_test_hexcmp(output, result_str->x,
                                            output_len,
                                            result_str->len) == 0);
        }
    }

exit:
    mbedtls_mpi_free(&N); mbedtls_mpi_free(&P);
    mbedtls_mpi_free(&Q); mbedtls_mpi_free(&E);
    mbedtls_rsa_free(&ctx);
}
/* END_CASE */

/* BEGIN_CASE */
void pkcs1_v15_decode(data_t *input,
                      int expected_plaintext_length_arg,
                      int output_size_arg,
                      int expected_result)
{
    size_t expected_plaintext_length = expected_plaintext_length_arg;
    size_t output_size = output_size_arg;
    mbedtls_test_rnd_pseudo_info rnd_info;
    mbedtls_mpi Nmpi, Empi, Pmpi, Qmpi;
    mbedtls_rsa_context ctx;
    static unsigned char N[128] = {
        0xc4, 0x79, 0x4c, 0x6d, 0xb2, 0xe9, 0xdf, 0xc5,
        0xe5, 0xd7, 0x55, 0x4b, 0xfb, 0x6c, 0x2e, 0xec,
        0x84, 0xd0, 0x88, 0x12, 0xaf, 0xbf, 0xb4, 0xf5,
        0x47, 0x3c, 0x7e, 0x92, 0x4c, 0x58, 0xc8, 0x73,
        0xfe, 0x8f, 0x2b, 0x8f, 0x8e, 0xc8, 0x5c, 0xf5,
        0x05, 0xeb, 0xfb, 0x0d, 0x7b, 0x2a, 0x93, 0xde,
        0x15, 0x0d, 0xc8, 0x13, 0xcf, 0xd2, 0x6f, 0x0d,
        0x9d, 0xad, 0x30, 0xe5, 0x70, 0x20, 0x92, 0x9e,
        0xb3, 0x6b, 0xba, 0x5c, 0x50, 0x0f, 0xc3, 0xb2,
        0x7e, 0x64, 0x07, 0x94, 0x7e, 0xc9, 0x4e, 0xc1,
        0x65, 0x04, 0xaf, 0xb3, 0x9f, 0xde, 0xa8, 0x46,
        0xfa, 0x6c, 0xf3, 0x03, 0xaf, 0x1c, 0x1b, 0xec,
        0x75, 0x44, 0x66, 0x77, 0xc9, 0xde, 0x51, 0x33,
        0x64, 0x27, 0xb0, 0xd4, 0x8d, 0x31, 0x6a, 0x11,
        0x27, 0x3c, 0x99, 0xd4, 0x22, 0xc0, 0x9d, 0x12,
        0x01, 0xc7, 0x4a, 0x73, 0xac, 0xbf, 0xc2, 0xbb
    };
    static unsigned char E[1] = { 0x03 };
    static unsigned char P[64] = {
        0xe5, 0x53, 0x1f, 0x88, 0x51, 0xee, 0x59, 0xf8,
        0xc1, 0xe4, 0xcc, 0x5b, 0xb3, 0x75, 0x8d, 0xc8,
        0xe8, 0x95, 0x2f, 0xd0, 0xef, 0x37, 0xb4, 0xcd,
        0xd3, 0x9e, 0x48, 0x8b, 0x81, 0x58, 0x60, 0xb9,
        0x27, 0x1d, 0xb6, 0x28, 0x92, 0x64, 0xa3, 0xa5,
        0x64, 0xbd, 0xcc, 0x53, 0x68, 0xdd, 0x3e, 0x55,
        0xea, 0x9d, 0x5e, 0xcd, 0x1f, 0x96, 0x87, 0xf1,
        0x29, 0x75, 0x92, 0x70, 0x8f, 0x28, 0xfb, 0x2b
    };
    static unsigned char Q[64] = {
        0xdb, 0x53, 0xef, 0x74, 0x61, 0xb4, 0x20, 0x3b,
        0x3b, 0x87, 0x76, 0x75, 0x81, 0x56, 0x11, 0x03,
        0x59, 0x31, 0xe3, 0x38, 0x4b, 0x8c, 0x7a, 0x9c,
        0x05, 0xd6, 0x7f, 0x1e, 0x5e, 0x60, 0xf0, 0x4e,
        0x0b, 0xdc, 0x34, 0x54, 0x1c, 0x2e, 0x90, 0x83,
        0x14, 0xef, 0xc0, 0x96, 0x5c, 0x30, 0x10, 0xcc,
        0xc1, 0xba, 0xa0, 0x54, 0x3f, 0x96, 0x24, 0xca,
        0xa3, 0xfb, 0x55, 0xbc, 0x71, 0x29, 0x4e, 0xb1
    };
    unsigned char original[128];
    unsigned char intermediate[128];
    static unsigned char default_content[128] = {
        /* A randomly generated pattern. */
        0x4c, 0x27, 0x54, 0xa0, 0xce, 0x0d, 0x09, 0x4a,
        0x1c, 0x38, 0x8e, 0x2d, 0xa3, 0xc4, 0xe0, 0x19,
        0x4c, 0x99, 0xb2, 0xbf, 0xe6, 0x65, 0x7e, 0x58,
        0xd7, 0xb6, 0x8a, 0x05, 0x2f, 0xa5, 0xec, 0xa4,
        0x35, 0xad, 0x10, 0x36, 0xff, 0x0d, 0x08, 0x50,
        0x74, 0x47, 0xc9, 0x9c, 0x4a, 0xe7, 0xfd, 0xfa,
        0x83, 0x5f, 0x14, 0x5a, 0x1e, 0xe7, 0x35, 0x08,
        0xad, 0xf7, 0x0d, 0x86, 0xdf, 0xb8, 0xd4, 0xcf,
        0x32, 0xb9, 0x5c, 0xbe, 0xa3, 0xd2, 0x89, 0x70,
        0x7b, 0xc6, 0x48, 0x7e, 0x58, 0x4d, 0xf3, 0xef,
        0x34, 0xb7, 0x57, 0x54, 0x79, 0xc5, 0x8e, 0x0a,
        0xa3, 0xbf, 0x6d, 0x42, 0x83, 0x25, 0x13, 0xa2,
        0x95, 0xc0, 0x0d, 0x32, 0xec, 0x77, 0x91, 0x2b,
        0x68, 0xb6, 0x8c, 0x79, 0x15, 0xfb, 0x94, 0xde,
        0xb9, 0x2b, 0x94, 0xb3, 0x28, 0x23, 0x86, 0x3d,
        0x37, 0x00, 0xe6, 0xf1, 0x1f, 0x4e, 0xd4, 0x42
    };
    unsigned char final[128];
    size_t output_length = 0x7EA0;

    memset(&rnd_info, 0, sizeof(mbedtls_test_rnd_pseudo_info));
    mbedtls_mpi_init(&Nmpi); mbedtls_mpi_init(&Empi);
    mbedtls_mpi_init(&Pmpi); mbedtls_mpi_init(&Qmpi);
    mbedtls_rsa_init(&ctx);

    TEST_ASSERT(mbedtls_mpi_read_binary(&Nmpi, N, sizeof(N)) == 0);
    TEST_ASSERT(mbedtls_mpi_read_binary(&Empi, E, sizeof(E)) == 0);
    TEST_ASSERT(mbedtls_mpi_read_binary(&Pmpi, P, sizeof(P)) == 0);
    TEST_ASSERT(mbedtls_mpi_read_binary(&Qmpi, Q, sizeof(Q)) == 0);

    TEST_ASSERT(mbedtls_rsa_import(&ctx, &Nmpi, &Pmpi, &Qmpi,
                                   NULL, &Empi) == 0);
    TEST_ASSERT(mbedtls_rsa_complete(&ctx) == 0);

    TEST_ASSERT(input->len <= sizeof(N));
    memcpy(original, input->x, input->len);
    memset(original + input->len, 'd', sizeof(original) - input->len);
    TEST_ASSERT(mbedtls_rsa_public(&ctx, original, intermediate) == 0);

    memcpy(final, default_content, sizeof(final));
    TEST_ASSERT(mbedtls_rsa_pkcs1_decrypt(&ctx,
                                          &mbedtls_test_rnd_pseudo_rand,
                                          &rnd_info, &output_length,
                                          intermediate, final,
                                          output_size) == expected_result);
    if (expected_result == 0) {
        TEST_ASSERT(output_length == expected_plaintext_length);
        TEST_ASSERT(memcmp(original + sizeof(N) - output_length,
                           final,
                           output_length) == 0);
    } else if (expected_result == MBEDTLS_ERR_RSA_INVALID_PADDING ||
               expected_result == MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE) {
        size_t max_payload_length =
            output_size > sizeof(N) - 11 ? sizeof(N) - 11 : output_size;
        size_t i;
        size_t count = 0;

#if !defined(MBEDTLS_RSA_ALT)
        /* Check that the output in invalid cases is what the default
         * implementation currently does. Alternative implementations
         * may produce different output, so we only perform these precise
         * checks when using the default implementation. */
        TEST_ASSERT(output_length == max_payload_length);
        for (i = 0; i < max_payload_length; i++) {
            TEST_ASSERT(final[i] == 0);
        }
#endif
        /* Even in alternative implementations, the outputs must have
         * changed, otherwise it indicates at least a timing vulnerability
         * because no write to the outputs is performed in the bad case. */
        TEST_ASSERT(output_length != 0x7EA0);
        for (i = 0; i < max_payload_length; i++) {
            count += (final[i] == default_content[i]);
        }
        /* If more than 16 bytes are unchanged in final, that's evidence
         * that final wasn't overwritten. */
        TEST_ASSERT(count < 16);
    }

exit:
    mbedtls_mpi_free(&Nmpi); mbedtls_mpi_free(&Empi);
    mbedtls_mpi_free(&Pmpi); mbedtls_mpi_free(&Qmpi);
    mbedtls_rsa_free(&ctx);
}
/* END_CASE */

/* BEGIN_CASE */
void pkcs1_rsassa_v15_sign(int mod, char *input_P,
                           char *input_Q, char *input_N,
                           char *input_E, int digest, int hash,
                           data_t *message_str, data_t *rnd_buf,
                           data_t *result_str, int result)
{
    unsigned char output[128];
    mbedtls_rsa_context ctx;
    mbedtls_mpi N, P, Q, E;
    mbedtls_test_rnd_buf_info info;

    info.fallback_f_rng = mbedtls_test_rnd_std_rand;
    info.fallback_p_rng = NULL;
    info.buf = rnd_buf->x;
    info.length = rnd_buf->len;

    mbedtls_mpi_init(&N); mbedtls_mpi_init(&P);
    mbedtls_mpi_init(&Q); mbedtls_mpi_init(&E);
    mbedtls_rsa_init(&ctx);
    TEST_ASSERT(mbedtls_rsa_set_padding(&ctx,
                                        MBEDTLS_RSA_PKCS_V15, hash) == 0);

    memset(output, 0x00, sizeof(output));

    TEST_EQUAL(mbedtls_rsa_get_padding_mode(&ctx), MBEDTLS_RSA_PKCS_V15);
    TEST_EQUAL(mbedtls_rsa_get_md_alg(&ctx), hash);

    TEST_ASSERT(mbedtls_test_read_mpi(&P, input_P) == 0);
    TEST_ASSERT(mbedtls_test_read_mpi(&Q, input_Q) == 0);
    TEST_ASSERT(mbedtls_test_read_mpi(&N, input_N) == 0);
    TEST_ASSERT(mbedtls_test_read_mpi(&E, input_E) == 0);

    TEST_ASSERT(mbedtls_rsa_import(&ctx, &N, &P, &Q, NULL, &E) == 0);
    TEST_ASSERT(mbedtls_rsa_get_len(&ctx) == (size_t) ((mod + 7) / 8));
    TEST_ASSERT(mbedtls_rsa_complete(&ctx) == 0);
    TEST_ASSERT(mbedtls_rsa_check_privkey(&ctx) == 0);

    TEST_ASSERT(mbedtls_rsa_pkcs1_sign(
                    &ctx, &mbedtls_test_rnd_buffer_rand, &info,
                    digest, message_str->len, message_str->x,
                    output) == result);
    if (result == 0) {

        TEST_ASSERT(mbedtls_test_hexcmp(output, result_str->x,
                                        ctx.len, result_str->len) == 0);
    }

exit:
    mbedtls_mpi_free(&N); mbedtls_mpi_free(&P);
    mbedtls_mpi_free(&Q); mbedtls_mpi_free(&E);
    mbedtls_rsa_free(&ctx);
}
/* END_CASE */

/* BEGIN_CASE */
void pkcs1_rsassa_v15_verify(int mod, char *input_N, char *input_E,
                             int digest, int hash, data_t *message_str,
                             char *salt, data_t *result_str, int result)
{
    mbedtls_rsa_context ctx;
    mbedtls_mpi N, E;
    ((void) salt);

    mbedtls_mpi_init(&N); mbedtls_mpi_init(&E);
    mbedtls_rsa_init(&ctx);
    TEST_ASSERT(mbedtls_rsa_set_padding(&ctx,
                                        MBEDTLS_RSA_PKCS_V15, hash) == 0);

    TEST_EQUAL(mbedtls_rsa_get_padding_mode(&ctx), MBEDTLS_RSA_PKCS_V15);
    TEST_EQUAL(mbedtls_rsa_get_md_alg(&ctx), hash);

    TEST_ASSERT(mbedtls_test_read_mpi(&N, input_N) == 0);
    TEST_ASSERT(mbedtls_test_read_mpi(&E, input_E) == 0);
    TEST_ASSERT(mbedtls_rsa_import(&ctx, &N, NULL, NULL, NULL, &E) == 0);
    TEST_ASSERT(mbedtls_rsa_get_len(&ctx) == (size_t) ((mod + 7) / 8));
    TEST_ASSERT(mbedtls_rsa_check_pubkey(&ctx) == 0);

    TEST_ASSERT(mbedtls_rsa_pkcs1_verify(&ctx, digest, message_str->len, message_str->x,
                                         result_str->x) == result);

exit:
    mbedtls_mpi_free(&N); mbedtls_mpi_free(&E);
    mbedtls_rsa_free(&ctx);
}
/* END_CASE */
